A tool designed for computing Euler’s totient function determines the count of positive integers less than or equal to a given integer that are relatively prime to it (share no common factors other than 1). For instance, for the input 10, the tool would output 4, as there are four numbers (1, 3, 7, and 9) coprime to 10.
This function, often denoted as (n), plays a significant role in number theory, particularly in modular arithmetic and cryptography. Its applications include calculating modulo inverses and estimating the security strength of cryptographic systems. Developed by Leonhard Euler in the 18th century, it forms a cornerstone of various mathematical theorems and concepts.